#661F18
Closest named color: Reddy Brown (#6E1005). oklch(35% 0.104 29), rgb(102, 31, 24).
Aa
White text reads best on this color (11.83:1).
About this color
#661F18 is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.104 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.026 away. White text reads best on it, at 11.83:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.104) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.77:1 |
| White text | 11.83:1 |
Values
| HEX | #661F18 |
| RGB | rgb(102, 31, 24) |
| HSL | hsl(5, 62%, 25%) |
| OKLCH | oklch(35% 0.104 29) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #661F18 | 11.83:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #661F18 | 1.77:1 | Fails | Lc 7.6 | Not readable |
| #661F18 text on white | 11.83:1 | AAA | Lc 96.3 | Preferred for body text |
| #661F18 text on black | 1.77:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F5CFC9
oklch(88.5% 0.044 28.5)
-
Step 300
300
#EFAEA4
oklch(80.9% 0.078 28.7)
-
Step 400
400
#E38173
oklch(70.7% 0.124 29.1)
-
Step 500
500
#D95D4E
oklch(63.2% 0.159 29.2)
-
Step 600
600
#C43E32
oklch(55.6% 0.172 28.9)
-
Step 700
700
#A92E24
oklch(49.1% 0.161 29)
-
Step 800
800
#892820
oklch(42.7% 0.133 28.6)
-
Step 900
900 (this color)
#661F18
oklch(35% 0.104 29)
-
Step 950
950
#411813
oklch(27.1% 0.065 29.1)
#661F18 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #332E17 | 0.109 |
| Deuteranopia (no green cones) | #443D16 | 0.100 |
| Tritanopia (no blue cones) | #710C1E | 0.035 |
| Achromatopsia (no color) | #373737 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661F18
#661F18
oklch(35% 0.104 29)
- #00434B
#00434B
oklch(35% 0.06 208.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #661F18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.026
- Claret #680018 ΔE 0.042
- Blood #770001 ΔE 0.044
- Chestnut #742802 ΔE 0.045
- Wine Red #7B0323 ΔE 0.055
- Burgundy #610023 ΔE 0.057
- Maroon #800000 ΔE 0.057
- Bordeaux #7B002C ΔE 0.063
Use #661F18 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.